Production of level dyeings on acrylonitrile polymer fibers with basic dyes

Abstract

Acrylonitrile polymer fibers are dyed level shades with basic dyes using as leveling agent a quaternary ammonium salt containing two or three benzyl groups as nitrogen ligands.

We claim: 
     
       1. In a process for the production of level dyeings on acrylonitrile polymer fibers with a basic dye using a quaternary ammonium salt as a levelling agent, the improvement which comprises utilizing as said levelling agent from 0.5 to 10% by weight, with reference to said fibers, of the quaternary ammonium salt of the formula ##SPC4## in which R 1  is alkyl of one to four carbon atoms or benzyl; R 2  is alkyl of one to four carbon atoms; or R 1  and R 2  taken together form a heterocyclic ring of four to six carbon atoms with N +;  and X is the radical of an organic or inorganic acid.   
     
     
       2. A process as claimed in claim 1 wherein levelling is carried out with the quaternary ammonium salt in a blank dye liquor on the dyed material after it has been dyed. 
     
     
       3. A process as claim in claim 1 where X -  in the formula is an anion from the group: Cl - , Br - , CH 3  OSO 3   - , HOSO 3   - , HCOO - , CH 3  --COC - , HOCO--(CHOH) 2  --COO -  or ##SPC5## 
     
     
       4. A process as claimed in claim 1 wherein the levelling agent is used in the dye liquor in an amount from 0.5 to 5% by weight. 
     
     
       5. A process as claimed in claim 1 wherein the levelling agent is used in the dye liquor in an amount from 1 to 4% by weight.